Clavius is a bauriar, a goat-human centaur creature native to Ysgard. After getting bitten by the wanderlust bug as a youth, he traveled the Planes and explored the multiverse. But now that he's gotten older, he's settled down in Sigil's Grand Bazaar and makes a living selling wood carvings from a small tent. Due to his independent spirit and stubborn nature, Clavius naturally fell in with the Free League in the Bazaar and often helps the Indeps keep an eye on the market and pass information around to like-minded free thinkers.

Back when Cal first came to Sigil, Clavius was one of the first people he befriended. Clavius gave Cal a place to work and a few coins for his wood carving skills when he was new to the Cage, and still offers useful information whenever he can.